A category killer is a retailer that specializes in and carries a deep product assortment within a given category and through selection, pricing and market penetration obtains a massive competitive advantage over other retailers. Chains such as Barnes & Noble, Best Buy, and Staples are considered category killers.
- Lal, Rajiv; Alvarez, Jose B (10 October 2011). "Retailing Revolution: Category Killers on the Brink". Working Knowledge. Harvard Business School. Retrieved 16 November 2016.
The dictionary definition of category killer at Wiktionary